Thanks for the reply--would these plugs have a single ground strap or double? Also wondering if these are the replacement plug for the unshielded version of the 0-145 Lyc ignition system. I just can't see opening my current plugs to .025 as is called for in the engine manual. I really appreciate the interest you have shown by responding. Thank you, Rod

Pics are worth a thousand words... Champion makes the M41E's and that's the only plug in production (that I know of) made for unshielded aircraft ignition. And the plug is made to accept the both clamp and spade leads. What kind of Mags do you have?

I am quite certain I have the M-41 E plug from Champion (33+ bucks a peice) I also have the connector (clamp) shown on the bottom right. I have the Eissman mags (sometimes referred to as "suitcase" mags. The spark plug gap for the recommended unshielded plug (AH-4) is supposed to be .025. I am not sure the M-43 can be set for this much gap?? Mine are set at .018 and have worked very well for the past year. I thank you for your response. I have heard, don't fool with success! Rod Zapf

I have been using the "short" original unshielded spark plugs that fit nicely under the hood of my '41 chief powered by 0-145 Lyc. I would like to shield these plugs without going to the new type shielded plugs that donot fit under the "hood". Does any one happen to have a set of the "shields" I have seen that encase the old plugs so that dimpling the cowling is not necessary. Not certain what these "shields" are called, but the plug fits inside them and shielded plug wire is then connected to the mags. Rod

Wow, thanks guys, this is too much for me to digest at this time of night. I will try again tomorrow. I did try Breeze Cups and Breeze Corp. with no luck, added Fresno, still no luck--Can you help me along a little further--thanks Paul (later) found Breeze marine shielding, dated 1945 with no up dates. Looked like exactly what I am looking for but no way of contacting. Rod

Paul. just sold an Ercoupe with the plug shielding you are referring to, that is where I got the idea. I will contact Fresno Air Parts tomorrow. Thanks for the input! The Ol' Lyc just keeps purring but sure puts out a lot of static. Rod

Paul. just sold an Ercoupe with the plug shielding you are referring to, that is where I got the idea. I will contact Fresno Air Parts tomorrow. Thanks for the input! The Ol' Lyc just keeps purring but sure puts out a lot of static. Rod